init commit

python_app/gui/runtime/constraints.py

@@ -0,0 +1,21 @@
+"""Validation helpers for GUI processing mode constraints."""
+
+from __future__ import annotations
+
+from python_app.models.run_config_model import RunConfigModel
+
+
+def validate_processing_mode_constraints(processing_mode: str, config: RunConfigModel) -> None:
+    """Validate mode-specific constraints for current run configuration."""
+    if processing_mode != "bscan":
+        return
+
+    any_native_switch = config.input_switch.driver_mode == "native" or config.output_switch.driver_mode == "native"
+    if not any_native_switch:
+        return
+
+    combo_count = len({(int(combo.input), int(combo.output)) for combo in config.combos})
+    if combo_count != 1:
+        raise RuntimeError(
+            f"B-scan with native switches requires exactly one run combo (now {combo_count})"
+        )